Unsalan O, Altunayar-Unsalan C
Ege University, Faculty of Science, Department of Physics, 35100 Bornova, Izmir, Turkey.
Ege University, Central Research Testing and Analysis Laboratory Research and Application Center, 35100 Bornova, Izmir, Turkey.
Spectrochim Acta A Mol Biomol Spectrosc. 2020 Oct 15;240:118590. doi: 10.1016/j.saa.2020.118590. Epub 2020 Jun 11.
Olivine-ringwoodite and plagioclase-maskelynite transformation mechanisms in the Bursa L6 chondrite were determined by Raman and Attenuated Total Reflectance (ATR)-Fourier Transform Infrared (FTIR) spectroscopic techniques. Forsterite composition was estimated to be 75% by using Raman and IR correlation data. Possible high impact shock pressure for Bursa meteorite was found to be at least 64.9 GPa. Besides, based on the olivine doublet (820 and 852 cm) and Full Width at Half Maximum data (~20 and ~60 cm, respectively) for maskelynite (509 and 580 cm) observed in the Raman spectrum, we assigned the shock stage of this meteorite as at least S5, for the first time. Moreover, previously reported hypervelocity impact experiments also supported this assignment.
通过拉曼光谱和衰减全反射（ATR）-傅里叶变换红外（FTIR）光谱技术确定了布尔萨L6球粒陨石中橄榄石-林伍德石和斜长石-熔合斜长石的转变机制。利用拉曼光谱和红外相关数据估计镁橄榄石的含量为75%。发现布尔萨陨石可能受到的高冲击压力至少为64.9 GPa。此外，基于在拉曼光谱中观察到的熔合斜长石（509和580 cm）的橄榄石双峰（820和852 cm）以及半高宽数据（分别约为20和60 cm），我们首次将该陨石的冲击阶段确定为至少S5。此外，先前报道的超高速撞击实验也支持这一判定。
